单项选择题
A.too low lead B.water in fuel C.too tight spring D.leakage
Before starting the turning gear, （） should be worked b...
单项选择题Before starting the turning gear, （） should be worked by hand to minimize corrosive action on the liners.
A.the indicators B.the starting valves C.the cylinder lubricators D.the turning gear
Before starting the engine the air bottle should be （）....
单项选择题Before starting the engine the air bottle should be （）.
A.pumped up B.loaded C.discharged D.opened
Before replacing a piston you should check the rings to...
单项选择题Before replacing a piston you should check the rings to see that all clearances and gaps are within the permissible （）.
A.deflection B.discrepancy C.error D.tolerance
